42817571081 has 8 divisors (see below), whose sum is σ = 43821934464. Its totient is φ = 41813598960.

The previous prime is 42817571021. The next prime is 42817571099. The reversal of 42817571081 is 18017571824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42817571081 - 2²² = 42813376777 is a prime.

It is a super-2 number, since 2×42817571081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42817571021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129755 + ... + 320111.

It is an arithmetic number, because the mean of its divisors is an integer number (5477741808).

Almost surely, 2^42817571081 is an apocalyptic number.

It is an amenable number.

42817571081 is a deficient number, since it is larger than the sum of its proper divisors (1004363383).

42817571081 is a wasteful number, since it uses less digits than its factorization.

42817571081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195631.

The product of its (nonzero) digits is 125440, while the sum is 44.

The spelling of 42817571081 in words is "forty-two billion, eight hundred seventeen million, five hundred seventy-one thousand, eighty-one".